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Abstract

Rendered animal protein ingredients, such as feather meal and blood meal, are promising animal protein sources for the replacement of fish meal often proved to combine synergistically. Three practical diets containing similar amounts of PD/ED (22.0 mg/kJ) but differing in the amount of digestible protein were tested in sea bream juveniles of initial body weight 41.81±1.12 g. FBCM diet (40%PD) and FBM diet (42%PD) contained similar percentages of blood and feather meal (10% and 5%, respectively) but differed in the proportion of soybean / rapeseed meal. Although growth performance and feed utilization were very similar in all treatments, chemical composition showed that blood and feather meal supplementation increased significantly whole-body lipid content compared with fishmeal diet (P205A). Liver lipid content was significantly lower in fish fed FBCM diet. Whole-body fatty acids composition was similar between treatments, ranging between 242.57±14.17 mg g -1 in FBM diet and 274.62±23.95 mg g -1 for FBCM diet. Palmitic acid, oleic acid, linoleic acid; EPA and DHA were the most abundant fatty acids in both polar and neutral lipid fractions of the fish. Economical evaluation indicated that the incorporation of blood and feather meal as a substitute of fish meal decreased feed costs leading to a better economic conversion ratio

Hermetia illucens and Poultry by-Product Meals as Alternatives to Plant Protein Sources in Gilthead Seabream (Sparus aurata) Diet: A Multidisciplinary Study on Fish Gut Status

“…To date, besides protein-rich plant derivatives, other protein sources such as processed animal proteins (PAPs) and, recently, insect meals have been tested in diets for gilthead seabream [48,[70][71][72]. Among PAPs, poultry by-product meal has been studied in previous experiments on juvenile sea bream, where it was found not to be detrimental in terms of growth performance and feed efficiency when included at amounts of up to 25% in diets largely based on fish meal [73].…”

“…Recently, PBM [47][48][49][50][51] and insect meal [52,53] were tested as alternative ingredients for seabream diet formulation with promising results in terms of zootechnical parameters, fish health, and fillet quality, while scarce information is so far available about the effects of these ingredients on the fish intestine and liver response. In addition, in the previous experiments, PBM and insect meal were tested as an FM substitute, while the effect of their inclusion on a vegetable-based diet, singly or in combination, is still unknown in gilthead seabream.…”

A Comprehensive Approach to Assess Feathermeal as an Alternative Protein Source in Aquafeed

“…These preliminary findings underlined that the relationship between chemical and physicochemical changes of proteins and digestibility is more or less straightforward; hence, the biochemical and biological effects, especially the bioavailability, must be taken into account upon evaluating protein replacement. In previous studies on replacement of fishmeal with feathermeal, − there has, to the best of our knowledge, been no focus on the relationship between feed protein chemical changes and fish biological performance.…”

Μεταποιημένες ζωικές πρωτεΐνες μη μηρυκαστικών στην εφαρμοσμένη διατροφή της τσιπούρας (Sparus aurata)

“…Έχει αποδειχθεί ότι η πρωτεΐνη του πτεραλεύρου, όταν χρησιμοποιείται ως η μοναδική χερσαία πηγή ζωικής πρωτεΐνης στο σιτηρέσιο, μπορεί να αντικαταστήσει με επιτυχία τα ιχθυάλευρα σε χαμηλά επίπεδα στα είδη όπως τα Oncorhynchus tshawytscha (Fowler 1990), Epinephelus malabaricus (Li et al, 2009) και Pacifastacus leniusculus (Fuertes et al 2014), σε σημαντικά επίπεδα αντικατάστασης στο O. mykiss (Bureau et al 2000) και στο Paralichthys olivaceus (Kikuchi et al 1994) και ακόμη και σε υψηλά επίπεδα στο Labeo rohita (Hasan et al 1997), O. niloticus (Bishop et al 1995) και D. labrax (Campos et al 2017). Ωστόσο, μελέτες αναφορικά με τη χρήση του πτεραλεύρου στη διατροφή της τσιπούρας (S. aurata) είναι εξαιρετικά περιορισμένες (Alexis 1997, Nengas et al 1999, Nogueira et al 2012.…”

“…και D. labrax(Campos et al 2017). Ωστόσο, μελέτες αναφορικά με τη χρήση του πτεραλεύρου στη διατροφή της τσιπούρας (S. aurata) είναι εξαιρετικά περιορισμένες(Alexis 1997, Nengas et al 1999, Fasakin et al 2005, O. mykiss(Poppi et al 2011) και T. tinca (González-Rodriguez et al 2014, αν και όταν χρησιμοποιείται σε μείγματα με άλλες χερσαίες ζωικές πρωτεΐνες μπορεί να μην έχει τόσο αρνητικό αντίκτυπο στην πρόσληψη της τροφής(Xue et al 2012, Wang et al 2010, Hu et al 2013, συμπεριλαμβανομένης της τσιπούρας(Nogueira et al 2012). Είναι ενδιαφέρον ότι οιCampos et al (2017) δουλεύοντας με το D. labrax πρότειναν ότι ακόμη και τα υψηλά επίπεδα HFM επιφέρουν μια γεύση στην τροφή, που όμως τελικά δεν επηρεάζει την πρόσληψή της από τα ψάρια.…”